Patent US3277008A successfully refreshed from Google Patents.
US3277008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface cleaning method and composition
Assignee: Pfaudler Permutit Inc
•
Filing: 1962-04-20
•
Granted: 1966-10-04
•
Expires: 1982-04-20
Abstract
No abstract record available.
Inventors
- 👤 Allyn H Heit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:05
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A METHOD OF DESCALING THE INTERNAL METAL SURFACES OF THE JACKET OF GLASS-LINED JACKETED EQUIPMENT WHILE PREVENTING SPALLATION OF THE GLASS-LINING WHICH COMPRISES CIRCULATING THROUGH THE JACKET AN AQUEOUS ACIDIC SOLUTION CONTAINING FROM ABOUT 2 TO 20 PERCENT BY WEIGHT OF AN ALPHABETA ETHYLENICALLY UNSATURATED, WATER-SOLUBLE CARBOXYLIC ACID, SAID CARBOXYLIC ACID BEING OF SUCH NATURE AS TO REACT WITH INSOLUBLE PHOSPHATES, CARBONATES, AND HYDROXIDES TO PRODUCE WATER-SOLUBLE COMPOUNDS.
Claim 2
Independent Claim
68 words
A METHOD OF DESCALING THE INTERNAL METAL SURFACES OF THE JACKET OF GLASS-LINED JACKETED EQUIPMENT WHILE PREVENTING SPALLATION OF THE GLASS-LINING WHICH COMPRISES CIRCULATING THROUGH THE JACKET AN AQUEOUS ACIDIC SOLUTION CONTAINING FROM ABOUT 2 TO 20 PERCENT BY WEIGHT OF AN ALPHABETA ETHYLENICALLY UNSATURATED, WATER-SOLUBLE CARBOXYLIC ACID, SAID CARBOXYLIC ACID BEING OF SUCH NATURE AS TO REACT WITH INSOLUBLE PHOSPHATES, CARBONATES, AND HYDROXIDES TO PRODUCE WATER-SOLUBLE COMPOUNDS.
References Cited (Backward Citations)
US2796353A
Cited
US2425320A
Cited
US2419076A
Cited
US2847384A
Cited
US2995477A
Cited
US3041285A
Cited
US2996414A
Cited
US3003898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |